Multilayered thin films for perpendicular magnetic recording

Details Multilayered thin films for perpendicular magnetic recording Multilayered thin films for perpendicular magnetic recording

1994-04-04

1997-08-26

Kiliman, Leszek

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428333, 428336, 428668, 428669, 428670, 428672, 428673, 428678, 428679, 428680, 428694ML, 428694MT, 428694MM, 428694T, 428694TS, 428694TM, 428900, G11B 566, B32B 516

Patent

active

056609302

ABSTRACT:
A [(Pt/Co/Pt)/Pd] multilayer thin film (40) provides improved perpendicular anisotropy and magnetic coercivity relative to Pt/Co multilayer thin films (10) without reducing the Kerr rotations provided by the component Pt/Co layers (44, 48, 46). [(Pt/Co/Pt)/Pd] multilayer thin films (40) comprise a substrate (26), an optional underlayer (110) including a crystallographically textured layer (114) of Pt and a crystallographically textured layer (116) of Pd, and several quadlayers (42) of Pt, Co, and Pd forming a periodic array (43) in the direction of the normal to the substrate (26). Each quadlayer (42) of the periodic array (43) typically comprises a first layer (44) of Pt atoms approximately one to two atomic monolayers thick, a layer (46) of Co between one and three atomic monolayers thick, a second layer (48) of Pt of substantially the same thickness as the first layer (44) of Pt, and a layer (50) of Pd that is at least as thick as the Pt layers.

REFERENCES:
patent: 4610935 (1986-09-01), Kumasaka
M. Sokumi and T. Shinjo, "Magnetic and magneto-optical properties of Pd/Au/Pd/Co and Pd/Cu/Pd/Co multilayers", J.MMM 128/1993, pp. 237-246.
P.J.H. Bloemen and W.J.M. de Jonge, "Magnetic anisotropy of Co/Ni/Co/Pt multilayers", JMMM 116 /1992, pp. L1-L6.

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